Method of working channel-furnaces for burning ore-bricks.



- en rees,

1,58,. Eo Drawing.

Sipeeizicsticn of letters iinoiicaticn filed! sums-2 21921).

borhood, to provide a special boiler for produoing the necessary steam for operating the generator. It has proved advantageous and in some cases even necessary to operate the generators with air mixed with steam. As a substitute for the boiler it has then been proposed to insert tubular systems containing water in the furnace to be heated. by the combustion gases' Such an arrangement, however, becomes rather and considerable expenses will also result, if the steam special boiler plant.

The present invention has for its object a simple and-as far as the initial cost is concerned-Very inexpensive method of operatingsuch a generator,

In. most of the cases, the bricks or the like to be burned in channel furnaces contain a certain percentage of Water-from about 6% in dressed ore to about 18% in purple ore and 15% in ordinary clay bricks. This water is expelled by the combustion gases in the front part of the furnace, said gases ahsorhing the water so as to contain aconsiderable amount of steam, in this respect corresponding to the air supplied to a generator operated in the above-mentioned Way. The said combustion gases may therefore be directly clrawn out of the front end of the channel by means of a fan or an ejector and employed in feeding the generator with sir.

has to be taken 'fr'om'a Still when containing large quantities of carbonic acid, the said em oloyed for the purpose stated, because the cal-conic acici then will act in the same Way as the steam, z. e, to bind heat and reduce the operating temperature of the generator, so as to prorluce a porous slag, thoroughly burne, out not molten, ancl a concentrated gases may Well he actions:

' expensive, he the 7 gas. This will be son by following re- (1) When steam is used:

6+H,@=CO+H,,

2'. e. the formation of. carbon n1 hydrogen from the stearn of temperature (2) When carbonic acid. uses 1:

coco-22cc,

c. the formation of carbon nionoxicl from the carbonic acid canon dioni under recluetion of temperature.

II", however, as is ncrmaily the case, the combustion gases contain consicierable quantities of carbonic acid and steam, the ssicl gases cannot he used alone. In this case, the

said gases therefore rained either with not air from the lower chennei serving cool the trucks of the carriages or the I e carrying bricks air, a suitable mixture being alive-3 s to secure in a simple Way by contro quantities of gases "mixed togeth fact, that the combustion gases u v/Qll as the in thescid lower channel are hot, generally about 260 (1., and heat quantities thus are led. from the furnace, which quantities otherwise ma not be Well. utilise-(i, makes the arrangement still better with are spect to economy of The process can arise so used in naces, which can he consirieieci as a kind of channel furnaces.

Having now particularly described the nature of my invention and manner oi its operation, "What i claim is: v

l, The herein described method of bum-- ing ore bricks the like which consists in generating in a gas producer, burning it in tunnei furnace conteining the moist bricks to be burned, whereby the parcel nets of combustion of the gas'wiil mix with the steam formed from the water e'vn oo rated from the bricks by heat,and lee-tit ing the products of combustion mixed with the steam heel: to the (generstor.

The herein. descrili ing ore bricks and the like which consists in generating gas in a gas pi miucer, hor lng it in a tunnel Iiirnece oontnimng the ecl method oi? bean sec moist bricks to be burned,' whereby the prod ucts (If combustion of the gas will mix with m steam formed from the Water evaporate-r1 from the uricks by the hem. anal leading the products of combustion mixed with C 1s steam together with hot sirhack "to the generator.

emma In testimony whereof I have signed my name to thisspecification iniflhe presence of two subscribing witnesses.

ARTHUR Witnesses:

H. TELANDER, BIRGEE NORDFELDT.

EAMEN. 

